How did the Mexican-American War ignite a conflict over slavery between the North and the South?

Answer 1

explain how the results of 1860 presidential election and the issue of states rights influenced south Carolinas decision to secede from the union

Answer 2

What does your reading assignment say?

Answer 3

for the Mexican and American war question, you can look at this website:
www.pbslearningmedia.org/resource/amex25.socst.ush.mexwar/how-the-mexican-american-war-affected-slavery/

1860 presidential election question, you can look at this website too:
www.history.com/topics/american-civil-war/election-of-1860